The thing is that I am executing the script from OEM to get the data on all backup jobs for every database server and every database, but some databases are not tracked via OEM, so in the future I will need to loop through server names list in a text file and retrieve crontab data from each server

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You could likely use expect to do this. If you code to use ssh to contact each server, there would be no need to include passwords in your script.
Can you post an example of how you would do this by hand? Then I could show you how to automate it with expect.

This post first appeared at Oracleinaction (http://oracleinaction.com/undo-and-redo-in-oracle/)by Anju Garg (Myself).
I will demonstrate that undo for DML’s is stored both in undo tablespace and online redo logs. Then, we will analyze the reaso…